Add better Avro validation

[rayokota]

What

Add better Avro validation.

Fixes #364

Checklist

• [Y] Contains customer facing changes? Including API/behavior changes
• [Y] Did you add sufficient unit test and/or integration test coverage for this PR?
  • If not, please explain why it is not required

References

JIRA:

Test & Review

Open questions / Follow-ups

[Copilot]

Pull Request Overview

This PR adds validation to the AvroSerializer to ensure messages conform to their schema before serialization. The validation uses the Avro library's isValid method to check message structure and throws a SerializationError when validation fails.

• Adds Avro message validation before serialization
• Includes a test case for validation error handling
• Imports SerializationError for validation error reporting

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
schemaregistry/serde/avro.ts	Adds validation logic and imports SerializationError
schemaregistry/test/serde/avro.spec.ts	Adds test schema and validation test case

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[sonarqube-confluent]

Analysis Details

0 Issues

• 0 Bugs
• 0 Vulnerabilities
• 0 Code Smells

Coverage and Duplications

• 100.00% Coverage (70.80% Estimated after merge)
• No duplication information (2.00% Estimated after merge)

Project ID: confluent-kafka-javascript

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